200100001221221 has 2 divisors, whose sum is σ = 200100001221222. Its totient is φ = 200100001221220.

The previous prime is 200100001221167. The next prime is 200100001221257. The reversal of 200100001221221 is 122122100001002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183971624740996 + 16128376480225 = 13563614^2 + 4016015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200100001221221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200100001221196 and 200100001221205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200100001229221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100050000610610 + 100050000610611.

It is an arithmetic number, because the mean of its divisors is an integer number (100050000610611).

Almost surely, 2^{200100001221221} is an apocalyptic number.

It is an amenable number.

200100001221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200100001221221 is an equidigital number, since it uses as much as digits as its factorization.

200100001221221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 200100001221221 its reverse (122122100001002), we get a palindrome (322222101222223).

The spelling of 200100001221221 in words is "two hundred trillion, one hundred billion, one million, two hundred twenty-one thousand, two hundred twenty-one".